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DIAL heat pump efficiency: 40 outdoor models compared

DIAL has 40 heat pump outdoor models certified with this refrigerant group, in 50 AHRI-certified combinations. Each model is compared with models of the same size and duct type, so the scores below do not depend on which sizes DIAL makes. DIAL has no QMID (IRS Qualified Manufacturer ID) on file, so it is not ranked against other manufacturers.

New to heat pump ratings? The Simple view explains them in plain words →

ManufacturerData as of updated · sources

Outdoor models
40
AHRI certifications
50
Efficiency index
55%
Typical model vs same-size, same-type peers (44 models)
Meet CEE 2025
82.5%
33 models

How DIAL compares with comparable models

For each rating: the share of same-size, same-type models that a typical model of this manufacturer beats (50% is typical), its rank, and the raw median for context. Raw medians are not comparable across manufacturers that make different sizes.
DIAL against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of DIAL’s own modelsDIAL is strongest on capacity retention at 5°F (its typical model beats 58% of comparable models) and weakest on COP at 5°F (44%).
  • DIAL
  • Middle half of its models
  • Other ranked manufacturers
DIAL

Source: AHRI Directory, NEEP · as of

Average peer percentile of DIAL’s models
RatingBeats comparable modelsRankRaw median
Efficiency index44 models scored55%Not ranked—
COP at 5°F44 models scored44%Not ranked1.84
Capacity retention at 5°F44 models scored58%Not ranked72%
HSPF250 models scored51%Not ranked9.0
SEER250 models scored55%Not ranked20.5
EER250 models scored54%Not ranked12.5
Heating capacity at 5°F44 models scored55%Not ranked13,200 Btu/h

Standards met

Share of DIAL’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)82.5%33
CEE 2026 Tier 1 (Split ASHP)82.5%33
CEE Advanced Tier (Split ASHP)0%0
Xcel Energy Colorado cold-climate ASHP (2025)70%28
DOE Cold Climate Heat Pump Challenge0%0
ENERGY STAR Cold Climate60%24

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.
DIAL’s models inside each size and duct typeShape: every model of the group · blue: the middle half of this manufacturer’s models there, median dot, 10th–90th percentile line
  • DIAL (median, middle 50%, 10th–90th)
  • All models of the group
Ducted, up to 1.5 tons2.00884 modelsDucted, 2 tons2.00821 modelsDucted, 2.5–3 tons1.901,614 modelsDucted, 3.5–4.5 tons1.911,492 modelsNon-ducted, up to 1.5 tons1.902,417 modelsNon-ducted, 2 tons1.87611 modelsNon-ducted, 2.5–3 tons1.85975 modelsmedian

Source: AHRI Directory · as of

Share of comparable models beaten, per peer group
Size and duct typeModelsIndexCOP@5°FHSPF2SEER2
Ducted, up to 1.5 tons450%47%49%64%
Ducted, 2 tons462%39%67%83%
Ducted, 2.5–3 tons472%61%76%82%
Ducted, 3.5–4.5 tons251%38%64%81%
Non-ducted, up to 1.5 tons2450%37%43%43%
Non-ducted, 2 tons856%40%51%59%
Non-ducted, 2.5–3 tons463%71%61%45%

Every DIAL model in the market

DIAL’s 50 models with a known size and duct type, over the shape of the whole catalog.
DIAL models by size and ratingColoured: DIAL · grey shapes: all 11,475 models · lines: catalog medians by size
  • DIAL models
  • Ducted median by size
  • Non-ducted median by size
  • Every model at each size (width = count)
  • Standard threshold

Dots: 50 dial models, each through its representative certification, in the colour of the rating shown. The grey shapes count all 11,475 models, half a ton at a time.
Show the data as a table
COP at 5°F by size and duct type (every model, by rated cooling capacity)
Duct type, sizeModels10th pct.25thMedian75th90th
Ducted, 0.5 tons1751.701.851.902.102.26
Ducted, 1 ton3401.851.902.002.402.65
Ducted, 1.5 tons7891.751.852.002.202.55
Ducted, 2 tons7821.731.802.002.102.33
Ducted, 2.5 tons7351.711.801.902.092.48
Ducted, 3 tons6521.681.701.902.062.36
Ducted, 3.5 tons6411.611.801.952.202.50
Ducted, 4 tons3671.701.801.912.022.52
Ducted, 4.5 tons5441.701.801.912.082.34
Ducted, 5 tons251.801.801.901.902.15
Non-ducted, 0.5 tons7171.751.811.972.102.19
Non-ducted, 1 ton1,0641.751.801.902.072.25
Non-ducted, 1.5 tons8861.801.801.872.072.21
Non-ducted, 2 tons5641.801.801.832.042.21
Non-ducted, 2.5 tons2751.801.811.841.862.03
Non-ducted, 3 tons5021.801.801.902.002.09
Non-ducted, 3.5 tons701.821.831.902.002.28
Non-ducted, 4 tons2631.801.801.982.002.10
Non-ducted, 4.5 tons1031.771.771.801.972.02
Non-ducted, 5 tons291.982.002.102.302.47

Source: AHRI Directory · as of

Top DIAL models

Its top five cold-climate picks and its top five all-around models across sizes (both scores compare each model with models of its own size and duct type, so sizes compare), then, on each single rating, the model that beats the largest share of comparable models.

Cold-climate picks

Top 5 DIAL cold-climate picks across sizes. Qualifies when its capacity retention at 5°F (capacity at 5°F as a share of capacity at 47°F) is at least 70% and Capacity retention at 5°F, COP at 5°F, HSPF2 are all rated. Score = the equal-weight mean of its peer percentiles on Capacity retention at 5°F, COP at 5°F, HSPF2 (share of the other models in its peer group it beats, 0–100), all from one certified pairing: in each duct type a model is sold in, its qualifying pairing of that type with the best score; equal scores (one decimal) go to the higher heating capacity at 5°F.
# · Outdoor modelSize · typeCap. 5/47COP@5°FHSPF2Btu/h @5°FSEER2MeetsCombosAHRI ref.Compared withScore
19000-UNI-ODIAL · Hi UNIwith ductless indoor unit 9000Z-CAS-I1 ton9,000 Btu/h · Non-ducted92%2.2610.08,30020.5CEE 25CEE 26XcelES CC2206838614Non-ducted, up to 1.5 tons79.7
236000-UNI-ODIALwith ducted air handler 36000U-DUC-I3 tons36,000 Btu/h · Ducted76%2.209.527,40017.5CEE 25CEE 26Xcel2206838613Ducted, 2.5–3 tons78.1
336000-UNI-ODIALwith ductless indoor unit 36000U-CAS-IAlso listed as SZUN36WW2303 tons36,000 Btu/h · Non-ducted74%2.289.826,80018.0CEE 25CEE 26Xcel2206838618Non-ducted, 2.5–3 tons77.2
436000-CHP-ODIAL · Hi ULTRA HDwith ducted air handler 36000-CHP-AHU3 tons34,000 Btu/h · Ducted76%2.059.526,00018.0CEE 25CEE 26Xcel1207027467Ducted, 2.5–3 tons75.1
518000-UNI-ODIAL · Hi UNIwith ductless indoor unit 18000Z-CAS-IAlso listed as SZUN18WW2301.5 tons18,000 Btu/h · Non-ducted73%2.3610.013,20020.5CEE 25CEE 26XcelES CC2206838616Non-ducted, up to 1.5 tons73.0

All-around best

Top 5 DIAL models on the all-around score across sizes. Score = 50% heating, the mean of its peer percentiles on COP at 5°F, Capacity retention at 5°F, HSPF2, plus 50% cooling, the mean of its peer percentiles on SEER2 and EER2 (share of the other models in its peer group it beats, 0–100). All five ratings are required; there is no minimum heat kept at 5°F. In each duct type a model is sold in, it is scored on its pairing of that type with the best score; equal scores (one decimal) go to the higher cold-climate score, then the higher heating capacity at 5°F.
# · Outdoor modelSize · typeCap. 5/47COP@5°FHSPF2SEER2EER2MeetsCombosAHRI ref.Compared withScoreHeating halfCooling halfCold-climate score
136000Z-04-ODIAL · Hi MULTI XtremeAlso listed as MZME36WW4P230BAJ2.5 tons32,000 Btu/h · Ducted113%1.848.919.512.0CEE 25CEE 26XcelES CC2204793305Ducted, 2.5–3 tons78.669.288.069.2
224000Z-03-ODIAL · Hi MULTI XtremeAlso listed as MZME24WW3P230BBJ2 tons24,000 Btu/h · Ducted100%1.848.621.012.1CEE 25CEE 26XcelES CC2204793304Ducted, 2 tons72.256.587.956.5
324000Z-03-ODIAL · Hi MULTI XtremeAlso listed as MZME24WW3P230BBJ2 tons24,000 Btu/h · Non-ducted100%1.849.122.012.5CEE 25CEE 26XcelES CC2204793306Non-ducted, 2 tons71.364.478.264.4
436000Z-04-ODIAL · Hi MULTI XtremeAlso listed as MZME36WW4P230BAJ2.5 tons32,000 Btu/h · Non-ducted113%1.849.021.012.5CEE 25CEE 26XcelES CC2204793307Non-ducted, 2.5–3 tons69.564.075.064.0
536000-UNI-ODIALwith ducted air handler 36000U-DUC-I3 tons36,000 Btu/h · Ducted76%2.209.517.510.9CEE 25CEE 26Xcel2206838613Ducted, 2.5–3 tons67.678.157.178.1

Best model on each rating

DIAL’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°F36000-UNI-OAlso listed as SZUN36WW2302.28Non-ducted, 2.5–3 tons96%206838618
Capacity retention at 5°F36000Z-04-OAlso listed as MZME36WW4P230BAJ113%Non-ducted, 2.5–3 tons99%204793307
HSPF236000-UNI-O9.5Ducted, 2.5–3 tons83%206838613
SEER224000Z-03-OAlso listed as MZME24WW3P230BBJ21.0Ducted, 2 tons96%204793304
EER236000Z-04-OAlso listed as MZME36WW4P230BAJ12.5Non-ducted, 2.5–3 tons84%204793307
Heating capacity at 5°FMZME18WW2P230BAJ18,000 Btu/hNon-ducted, up to 1.5 tons92%213082089

All 40 DIAL models in Explore

DIAL size class by size class: cold-climate and all-around

Its best model on each board in every size and duct type it makes. Both scores are 0–100 against every model of that size class (the line on each bar is 50, the typical model there). Cold-climate picks must keep at least 70% of their heat at 5°F; the all-around score needs all five ratings and has no such bar.
DIAL: best cold-climate pick and best all-around model per size and duct type, with how many of its models are on each board (top 5 and 5 per class are in the snapshot)
Size and duct typeCold-climate pickCold-climate score, best modelAll-around bestAll-around score, best model
Ducted, up to 1.5 tons55.9(50 is the typical model of its size class)9000-UNI-Owith ducted air handler 9000Z-DUC-I3 of 4 models qualify · AHRI 20683860957.7(50 is the typical model of its size class)9000-UNI-Owith ducted air handler 9000Z-DUC-I4 of 4 models have all five ratings · AHRI 206838609
Ducted, 2 tons64.8(50 is the typical model of its size class)24000-UNI-Owith ducted air handler 24000Z-DUC-I4 of 4 models qualify · AHRI 20683861272.2(50 is the typical model of its size class)24000Z-03-OAlso listed as MZME24WW3P230BBJ4 of 4 models have all five ratings · AHRI 204793304
Ducted, 2.5–3 tons78.1(50 is the typical model of its size class)36000-UNI-Owith ducted air handler 36000U-DUC-I4 of 4 models qualify · AHRI 20683861378.6(50 is the typical model of its size class)36000Z-04-OAlso listed as MZME36WW4P230BAJ4 of 4 models have all five ratings · AHRI 204793305
Ducted, 3.5–4.5 tonsNone on this board (0 of 2 models qualify)57.1(50 is the typical model of its size class)48000-CHP-Owith ducted air handler 48000-CHP-AHU2 of 2 models have all five ratings · AHRI 207027469
Non-ducted, up to 1.5 tons79.7(50 is the typical model of its size class)9000-UNI-Owith ductless indoor unit 9000Z-CAS-I15 of 24 models qualify · AHRI 20683861465.9(50 is the typical model of its size class)9000-UNI-Owith ductless indoor unit 9000Z-CAS-I19 of 24 models have all five ratings · AHRI 206838614
Non-ducted, 2 tons72.0(50 is the typical model of its size class)24000-UNI-Owith ductless indoor unit 24000Z-CAS-IAlso listed as SZUN24WW2307 of 8 models qualify · AHRI 20683861771.3(50 is the typical model of its size class)24000Z-03-OAlso listed as MZME24WW3P230BBJ7 of 8 models have all five ratings · AHRI 204793306
Non-ducted, 2.5–3 tons77.2(50 is the typical model of its size class)36000-UNI-Owith ductless indoor unit 36000U-CAS-IAlso listed as SZUN36WW2304 of 4 models qualify · AHRI 20683861869.5(50 is the typical model of its size class)36000Z-04-OAlso listed as MZME36WW4P230BAJ4 of 4 models have all five ratings · AHRI 204793307

All-around board, every manufacturer

Newest DIAL certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified DIAL outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
SZHW18WW230BBEDIAL · Hi UNIwith ductless indoor unit SZHW18NN230BBE1.5 tons18,000 Btu/h · Non-ducted1.8066%9.222.5CEE 25CEE 26ES CC1215447700
SZHW12WW115BAGDIAL · Hi UNIwith ductless indoor unit SZHW12NN115BAG1 ton12,000 Btu/h · Non-ducted1.7570%9.521.7CEE 25CEE 26Xcel1213361984
SZHW23WW230BJEDIAL · Hi UNIwith ductless indoor unit SZHW23NN230BJE2 tons23,000 Btu/h · Non-ducted1.7578%8.620.5CEE 25CEE 26XcelES CC1213361983
MZME36WW4P230BAJDIAL · Hi MULTI Xtreme2.5 tons32,000 Btu/h · Ducted and non-ducted1.84113%9.021.0CEE 25CEE 26XcelES CC2213350266
MZME24WW3P230BBJDIAL · Hi MULTI Xtreme2 tons24,000 Btu/h · Ducted and non-ducted1.84100%9.122.0CEE 25CEE 26XcelES CC2213350265

Shares hardware with

Manufacturers whose models are the same equipment under another badge. About OEM families

No shared hardware found for DIAL in this group.

Compare DIAL

Manufacturers of a similar size, side by side.

Compare with any manufacturer

DIAL includes these brand names as listed in AHRI: DIAL. Standards are checked against published thresholds; program rules beyond ratings are not checked.